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A mass of 2 kg is suspended with thread AB (Fig.). Thread CD of the same type is attached to the other end of 2 kg mass. Lower thread is pulled gradually, harder and harder in the downward direction so as to apply force on AB. Which of the threads will break and why?If the lower thread is pulled with a jerk, what happen? |
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Answer» Thread CD will break. If the force is large and sudden, thread CD breaks because as CD is jerked, the pull is not transmitted to AB instantaneously (transmission depends on the elastic properties of the body). Therefore, before the mass moves, CD breaks. |
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